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View Full Version : Caught my hitchhiking crab, can anyone ID this guy?


ACBlinky
08/15/2006, 10:08 PM
This crab has been driving me crazy, hiding in a 10lb rock at the bottom of my reef. I'm pretty sure he's the reason one of my zoa colonies has been thinning out, he's a voracious meat-eater (he absolutely attacks silversides) but he's extremely secretive. I tried everything to get him out, and eventually ended up resorting to breaking his rock into pieces to get him out. He's not really agressive, I picked him up and he never tried to pinch me or run away. He was on a piece of rock that came in an Indo shipment, the LFS called it 'Pompeii' but... I think they meant Pohnpei. I'm not sure if that helps at all.

Here are some pics:
http://i8.photobucket.com/albums/a21/ACBlinky/Misc/Crab_top.jpg

http://i8.photobucket.com/albums/a21/ACBlinky/Misc/Crab_underside.jpg

http://i8.photobucket.com/albums/a21/ACBlinky/Misc/Crab_underside2.jpg

http://i8.photobucket.com/albums/a21/ACBlinky/Misc/Crab_front.jpg

Reef_bones
08/15/2006, 10:32 PM
six legs mean reef safe from what I have always heard. I have one that looks like that but I am not sure what it is as mine was a hitchhicker too. Its been in the tank over a year with no harm to anything

Dubbin1
08/15/2006, 10:59 PM
<a href=showthread.php?s=&postid=7948549#post7948549 target=_blank>Originally posted</a> by Reef_bones
six legs mean reef safe from what I have always heard. I have one that looks like that but I am not sure what it is as mine was a hitchhicker too. Its been in the tank over a year with no harm to anything

There is no truly reef safe crab.

affan
08/15/2006, 11:10 PM
Agreed. No crab is truly reef safe. Those claws are there for a reason: Catch & Kill. This might be a portunid family member.

JRistau81
08/15/2006, 11:52 PM
"Oppurtunistic Omnivore" says it all...

LeslieH
08/16/2006, 09:10 AM
This particular species is a frequent hitchhiker. As common as it is in aquariums it's apparently not commonly seen by underwater photographers as I have yet to find an identified image of it in any of my books. It's a xanthid crab and these are well known predators in reef tanks.

ACBlinky
08/16/2006, 09:55 AM
Thanks LeslieH :) this is the second time you've helped me try to ID something (and the second time I've found out it's something that I won't be able to get a species name for!) Knowing it's a xanthid crab is enough, now I know it was worth smashing up the rock to get him out :D

thor32766
08/16/2006, 10:26 AM
yeah that is a bad crab for sure!

reefing102
08/16/2006, 11:05 AM
looks like a stone crab